Seems to be a common discussion. A few years ago someone grabbed a toe hold on me. I didn't think they had it, until it popped. I didn't feel anything until maybe the next day. Had a sprained ankle for a few weeks or so. Last night someone put me in a sloppy knee bar. My knee popped. There was no pain or anything, and I went on to roll for the rest of the class (tapped some good people too). Woke up today with my knee stiff as hell. I'm hoping/expecting that a few days rest will do the trick as well. Anyone have something similar happen?